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Advantage of microscope
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Microscopes
Why is it relevant?
Microscopes are used to see things that are too small for the naked eye to see. It is essential for scientists in discovering new diseases and seeing tiny details on things like bacteria and the living tissue. In everyday life, microscopes is used for learning in schools and in medical research. Microscopes are relevant in all fields of science and many major discoveries have been made. Living cells, circulating blood, an understanding of nerves, different materials and their qualities and bacteria and diseases were all discovered by microscopes. For example Robert Koch in 1905 discovered that bacteria caused cholera and tuberculosis. Still today microscopes are being used to help our understanding of the world we live in and how our bodies work.
How does it work?
A simple light microscope works by using two convex lenses at either end of a tube. The first lens, the object lens, is spherical and has a very short focal length. The other lens, called the eyepiece, has a larger focal length. When an object is put on a platform under the object lens, the image of it is enlarged. This image acts as an object for the eyepiece which is enlarged again. This virtual image then is formed in the retina of your eye. A light is shined up from beneath the platform illuminating the object. In electron microscopes, rather than a light bulb, beams of electrons are shone through. This can magnify an object up to a million times its original size. Light microscopes can only magnify up to 200nm (a wave length of light) as predicted by Ernst Abe. Electron microscopes can magnify 1000 times this. On microscopes, there is a course focus and a fine focus to make adjust so that the image is clear and bright. Unlike tele...
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...2012). Science Inspiration: How does a Microscope Work?. [online] Scienceinspiration.blogspot.com.au. Available at: http://scienceinspiration.blogspot.com.au/2012/06/how-does-microscope-work.html [Accessed 26 May. 2014].
The Colonial Williamsburg Foundation, early leeuwenhoek microscope, In-text: (The Colonial Williamsburg Foundation, 2014) Bibliography: The Colonial Williamsburg Foundation, (2014). early leeuwenhoek microscope. [image] Available at: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQjIEeQKawcTOKNyqyI8b3deUbBslWGVq5rop5VvjrnXMPIjbjI5w [Accessed 27 May. 2014].
The royal society, Hookes' drawing of a flea In-text: (Hookes' drawing of a flea, 2014) Bibliography: Hookes' drawing of a flea. (2014). [image] Available at: https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRkQ2NezTga5YsAmRxgzZD3lY29S4xrvleJEE0h3V2k7FJu7MP_ [Accessed 27 May. 2014].
Apfeldorf’s article “Uncovering a Tiny World” discusses Hooke’s book which is known for its microscopic illustrations of insects and microbes that Hooke had drawn as he viewed them under the microscope. His elaborate drawings of tiny objects and insects were the scientific evidence that supported his claims of the significant value of the microscope to science and the many ways it could be used. The book also contained a description of how to make a powerful microscope with a spherical lens, much like Leeuwenhoek’s glass pearls. Leeuwenhoek traveled to England that same year and is believed to have obtained a copy of Hooke’s book and
To see a chemical at a microscopic level you would need to use a microscope versus the
Damiens, Robert F. Pièces Originales Et Procédures Du Procès, Fait à Robert-François Damiens. Paris: Pierre Guillaume Simon, 1757. Print.
Palermo, E. (2013, August 28). How Does Newton's Cradle Work? Retrieved May 17, 2014, from www.livescience.com: m.livescience.com/39271-how-does-newtons-cradle-work.html
John Donne's, "The Flea," is a persuasive poem in which the speaker is attempting to establish a sexual union with his significant other. However, based on the woman's rejection, the speaker twists his argument, making that which he requests seem insignificant. John Donne brings out and shapes this meaning through his collaborative use of conceit, rhythm, and rhyme scheme. In the beginning, Donne uses the flea as a conceit, to represent a sexual union with his significant other. For instance, in the first stanza a flea bites the speaker and woman. He responds to this incident by saying, "And in this flea our bloods mingled be."
Park, Rosalind.The Scientific Invention of Hieroglyphs or Hurrah for Pliny! Great Britain: Azoth Publications, 1997.
The development in the late 19th century of techniques for staining cell parts enabled scientists to detect tiny cell structures that were not actually seen in detail until the advent of the electron microscope in the 1940s. The development of various advanced optical techniques in the 20th century also increased the detection power of the light microscope for observations of living cells.
“The Flea” John Donne observes a typical bar, every Saturday night sweat drenched bodies emitting alcohol and pheromones from every pore, exchange conversation, pleasantries, and yes even sex (perhaps not directly in view but certainly eluded to). Is this animalistic, barbaric behavior acceptable? Should sex be taken so lightheartedly? Or do we take it too seriously, guarding sex like it was the Holy Grail, or the secret to life itself? These questions may be to deep and pointed for most to approach, yet John Donne in his poem “The Flea” wades through them like the kiddy pool. In this clever poem Donne uses a flea, blood, and the murder of the flea as an analogy for the oldest most primal exchange, sex. Donne, through symbolic images, not only questions the validity of coveting virginity but also the importance of sex as it pertains to life. The metaphors in “The Flea” are plentiful, but the symbols repeated throughout the poem are clear, beginning with the most prevalent, and the flea. This small parasitic creature is chalk full of symbolic meaning. During the time this poem was written (the Renaissance) the flea was use in many poems about sex. I derive that in this particular poem the flea is symbolic of the act of sex from the speaker’s remark in the beginning, “Mark but this flea, and mark in this, how little that which deniest me is” the flea is small and inconsequential, his lady denies him sex, which the speaker believes is also petty. The flea is described as a marriage temple and a carrier of life, but in the next stanza as something insignificant and small. The speaker applies a certain duality to the flea and therefore to sex. The metaphor develops more as it relates to the other symbols. Blood is used more than once a...
See the microscope is a pretty important part of the way we lived. It helped and even revolution both the biology and chemistry field of science in many ways. It helped the way we live too. Like help examine things such as urine or blood too sees if the person has any viruses. The microscope is an important tool in science.
The flea is a vessel that symbolizes union, in this case the physical union between the speaker and the woman through sexual intercourse and the exchange of bodily fluids. It is impo...
How Cryonics Works. In Science How Stuff Works. Retrieved December 29, 2013, from http://science.howstuffworks.com/life/genetic/cryonics2.htm Best, B. n.d. - n.d. - n.d. Cryonics Frequently Asked Questions. By Ben Best.
Microscopy allows one to view samples and objects that cannot be seen with the human eye. With all the modern techniques used in the biology field today, microscopy is one of the most important one that allows us to see a world beyond what our eyes limits us too. The majority of both organisms that are helpful and harmful are too small to be seen with the human eye, and without the microscope we would have not understood the mechanism behind the major diseases we know today. Microscopy has helped scientists produce antibiotics and antiviral drugs to treat the diseases that once were in a world beyond our vision. There are three types of microscopy mainly used: optical (light), electron, and scanning probe microscopy.
The microscope created new possibilities in the study biology. It allowed scientists to look into a completely new view of cellular biology. Galileo is credited with the invention of the microscope. Two of the main pioneers in microscope usage were Robert Hooke and Antonie von Leeuwenhoek.
The origin of the biological term cell came from Robert Hooke in 1662. He observed tiny compartments in the cork of a mature tree and gave them the Latin name “cellulae”, which translates into “small rooms”. In the late 1680s, Anton Van Leeuwenhoek was the first scientist to actually lay eyes on a cell. Before, there had been theories of “cells” but no one had the technology to see something so microscopic yet. Van Leeuwenhoek ran a draper 's shop and wanted to see the quality of the thread, better than the magnifying lenses available at that time. Therefore, he began to develop an interest in lens-making, with an interest already in microscopes and a familiarity with glass
Technology in the last few decades has impacted our understanding of biological entities greatly, the genome project being a prime example. The progress that biology sees follows closely with the development of new technology. It is very important to understand and visualise the composition and structures of biological materials or samples in order to extend and correlate this to the principles of life. Microscopy is a by far the most used and the most relevant technique in this regard. However the short comings in the technological aspect of this greatly limit the usage of this to comprehend the specifics.